Legacy token not available in the user UI

**Describe the bug**
After version v1.17 of Label Studio I can no longer see the value of the user Legacy Token from the UI. Legacy tokens are enabled in the Organisation settings.

While inspecting the network calls in the `user/account` page I can see the following:
1. a call is being made to: "https://myhost.com/api/current-user/token", but my `LABEL_STUDIO_HOST` is the following: "https://myhost.com/label-studio/" since I use a reverse proxy.
2. the `:path` header of the previous request is `/api/current-user/token`
3. the previous call returns 404 (as expected)
4. the call to the correct URL "https://myhost.com/label-studio/api/current-user/token" actually works.

Do I need to change other settings in the label-studio configuration since the new updates?

**Expected behavior**
The Legacy token should not be "undefines" and should be loaded correctly in the UI.
Most likely the `:path` header of the previous request in my case should be `/label-studio/api/current-user/token`.

**Screenshots**
Missing legacy token:

**Environment:**
- Label Studio Version v1.20.0